Rain means falling of water on the Earth from the clouds. It maintains the continuity of water cycle. It is an important weather component that affects the climate of a place. The region of the Earth that receives rainfall less than 254 mm per year is classified as desert. There are some regions on the Earth that receive rainfall less than 254 mm per year, but are not classified as deserts; they are Polar Regions and high mountains. On the contrary, there are some regions on the Earth that receive rainfall more than 2540 mm per year; they are classified as rainforests.
Rain
